#include<stdio.h>


int
main( )
{
	int i = 0;
	char c;
	char str[10];
	while ( ( c = getchar( ) ) != EOF ) {
		str[i++] = c;
		c = getchar( );
	}
	str[i] = 0;

	printf( "%s\n", str );

	return 0;
}
